Research On The Application Of UAV In Daily Maintenance Inspection Of Freeway Slope

Slope is an important part of high speed in mountain area,and the inspection and maintenance of slopes has always been the focus and difficulty of road inspection.At present,the daily maintenance patrol of the slope is mainly based on manual inspection,which is of high risk,high labor intensity,time consuming,and some of the slopes are prone to blind spots due to restrictions such as terrain and tools.This paper proposes and studies the use of UAV for slope maintenance inspection,and develops the Unmanned aerial vehicle(UAV)slope inspection scheme that meet the requirements of inspection.The main research contentsas are as follows:Firstly,the contents and requirements of the freeway slope maintenance inspection are clarified.The environment of the slope of the expressway,the problems existing in the inspection,and the characteristics of the drone are analyzed,and the UAV suitable for slope inspection is selected.And considering from the aspects of the performance of UAV,the characteristics of the external environment,and the task demands of inspection,the constraint conditions of UAV slope inspection are determined.Secondly,based on the manual analysis of the image's working mode,the quality of the inspection task is controlled from two aspects of shooting and flight to meet the inspector's interpretation of the slope state.According to the inspection,the slope is divided into steps and non-steps,and the characteristics of the slope are analyzed and different aerial photography methods are adopted.Then the inspection scheme of UAV slope maintenance is formulated.And the feasibility of the inspection scheme proposed in the article is verified by the slope of the Hanning Expressway in Shaanxi Province.The results show that the scheme is feasible and can improve work efficiency.Finally,according to the results and requirements of the initial inspections,the disease point or the suspected point of disease is selected as the collection point for the second inspection.Then abstracts the collection points to adjacency matrix,and calculates the shortest path of flying over all the collection points by ant colony algorithm,simulated annealing algorithm and genetic algorithm respectively.Through the calculation and the simulation results of MATLAB,the study compares among the path length and running time of various algorithms,then simulated annealing method is selected as the optimal algorithm for the second inspection path planning.This paper comprehensively considers the characteristics of drones and the characteristics of different types of slopes,formulates a UAV inspection scheme that meets the slope maintenance inspection work pattern,and selects an algorithm that is suitable for the secondary patrol path planning of the slope.It has a certain practical significance and reference value for realizing the application of UAV in slope maintenance inspection.